【摘要】 设计了一套应用于微机补偿晶体振荡器(MCXO)的自动调试测量系统.该系统集成了S&A4220高低温控制箱、高分辨率频率计、PC计算机、以及基于C8051F061单片机的控制器,能够同时调试测量8台MCXO.PC机的控制软件由LabVIEW编程实现,可对MCXO主要技术指标进行自动测量.运用该系统开发的MCXO,在-40~+85℃的宽温度范围内,频率温度稳定度达到±7×10-8.更多还原

【Abstract】 A real-time on-line automatic debugging and measuring system for microcomputer compensated crystal oscillator(MCXO)was designed.The system integrates the S&A4220temperature test chamber,a high precision frequency counter,apersonal computer,and a special microcontroller based on C8051F061with 8measuring channels.The control program on PC was designed by means of Labview. All main technical parameters of MCXO can be measured automatically with this system.Within the temperature range(-40 ℃to +85 ℃),the frequency-temperature stability of developed MCXO is≤±7× 10-8.更多还原